http://video.nytimes.com/video/2011/02/09/movies/1248069625002/a-rare-look-inside-pixar-studios.html 

A Nytimes video about the company…talks about Toy Story

The design of the building (by Steve Jobs) purposefully forces collisions between employees from different departments.

There are fun tricks and hidden treasures in the building…like a secret speakeasy…and giant sofas…Talk about physical prototyping scale models to test their design before they animate everything…lots of hand-drawn and hand-built work goes into it.